306493686 has 32 divisors (see below), whose sum is σ = 682668000. Its totient is φ = 101928960.

The previous prime is 306493657. The next prime is 306493687. The reversal of 306493686 is 686394603.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306493687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17926 + ... + 30566.

It is an arithmetic number, because the mean of its divisors is an integer number (21333375).

Almost surely, 2^306493686 is an apocalyptic number.

306493686 is an abundant number, since it is smaller than the sum of its proper divisors (376174314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

306493686 is a wasteful number, since it uses less digits than its factorization.

306493686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13101 (or 13095 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The square root of 306493686 is about 17506.9610726705. The cubic root of 306493686 is about 674.2286101497.

The spelling of 306493686 in words is "three hundred six million, four hundred ninety-three thousand, six hundred eighty-six".